Adhese® Universal Solves this Age Old ‘Dentin’ Dilemma
When using the Total Etch (etch and rinse) adhesives technique, it’s critical that the dentin is dried to the appropriate degree before the bonding agent is applied. Highly moist dentin will affect the quality of the bond because it’s difficult to bond anything to a wet surface. When air drying the dentin before applying the adhesive, it is important not to over dry (desiccate) the dentin because this would collapse the collagen network and prevent the adhesive from infiltrating the dentinal tubules. Not infiltrating the dentinal tubules reduces the bond strength and introduces the possibility of post-operative sensitivity. Not properly sealing the dentin tubules causes pressure or ionic changes in the fluid flow that exists in the dentin tubules, which stimulates post-operative sensitivity.
This is the primary reason why dental adhesives are considered “technique sensitive.” Some manufacturers try to explain the proper moisture level by using descriptions such as “the objective is a surface with a silky matt appearance.” Wouldn’t it be nice to have a dental adhesive that has superior long-term performance when applied to either wet or dry dentin?
Adhese® Universal has a high tolerance to different degrees of clinically relevant dentin moisture, as demonstrated by the independent studies below. It was formulated with a functionalized methacrylated carboxylic acid polymer (MCAP) which ensures the formation of a stable, homogenous film layer for excellent tolerance against different moisture levels and application techniques (e.g. air drying techniques). Adhese® Universal uses an optimized solvent, which helps de-tangle and re-wet collapsed collagen fibers. Using only a single layer of adhesive, consistently high bond strengths on enamel and dentin are achieved irrespective of the etching protocol used and moisture level of the dentin.
Wet vs. Dry Bonding – Total-Etch
Shear Bond Strength on Dentin in combination with Tetric EvoCeram® Bulk Fill
“Universal Adhesives” has been recently introduced to eliminate the complexity and limitations of bonding techniques; self etch, selective etch or etch and rinse, for direct and indirect bonding procedures and with light, dual and self-cure materials. Adhese® Universal takes ‘ease of use’ one step further by eliminating the technique sensitivity associated with the age-old dilemma of “how dry is dry?”